Solar guide
Solar panel output calculator
Estimate daily, monthly and annual solar production from system size, peak sun hours and a real-world performance ratio.
Estimate how much electricity a solar panel system can generate per day, month and year.
Use the main calculator
The full interactive calculator is available on the homepage. This page exists to explain the specific calculation topic in more detail and to help users understand the assumptions before making decisions.
Key assumptions to check
- Your average electricity price per kWh.
- Your local feed-in or export tariff.
- Average peak sun hours for your region.
- Roof orientation, pitch and shading.
- Installed cost after incentives or grants.